Geotechnical Engineering

DHARM 520 GEOTECHNICAL ENGINEERING 47.8 18.6 3m 18.6 kN/m^2 Pa 2.89 m Wall 9m g= 21 kN/m^3 f= 33° g= 27 kN/m^3 f= 33° (a) (b) Fi ...

DHARM LATERAL EARTH PRESSURE AND STABILITY OF RETAINING WALLS 521 Ka for top layer = 130 130 1 3 −° +° sin = sin Ka for bottom l ...

DHARM 522 GEOTECHNICAL ENGINEERING c = 12 kN/m^2 γ = 17.0 kN/m^3 ∴ zc = 212 17 0 × ×1 428 . .m = 2.00 m Example 13.12: A retaini ...

DHARM LATERAL EARTH PRESSURE AND STABILITY OF RETAINING WALLS 523 Example 13.13: A smooth vertical wall 5 m high retains a soil ...

DHARM 524 GEOTECHNICAL ENGINEERING H = 9 m γ = 18 kN/m^3 Pa = 180 kN/m. run Initially, Pa = 1 2 γHK^2 . a ∴ 180 = 1 2 ×× ×18 9^2 ...

DHARM LATERAL EARTH PRESSURE AND STABILITY OF RETAINING WALLS 525 Since wall friction is to be accounted for, Coulomb’s theory i ...

DHARM 526 GEOTECHNICAL ENGINEERING φ = 30° δ = 15° γ = 20 kN/m^2 15° 6m Wall a= 75° b= 15° Fig. 13.61 Battered wall with incline ...

DHARM LATERAL EARTH PRESSURE AND STABILITY OF RETAINING WALLS 527 γ = 18 kN/m^3 H = 10 m. φ = 30° δ = 20° β = 20° α = 90° ψ = α ...

DHARM 528 GEOTECHNICAL ENGINEERING 9° a= 81° Wall 3.6 m b= 10° Repture plane x = 2.40 m 2.35 m 69° f=line f= 30° (+) = 42° fd fa ...

DHARM LATERAL EARTH PRESSURE AND STABILITY OF RETAINING WALLS 529 Pa = 1 2 1 2 γψx^22 sin =× × ×19 3 sin 70 ° = 80.34 kN/m. Exam ...

DHARM 530 GEOTECHNICAL ENGINEERING H = 3.6 m φ = 20° β = 20° α = 81° δ = 12° ψ = α – δ = 69° Since β = φ, the special case of Re ...

DHARM LATERAL EARTH PRESSURE AND STABILITY OF RETAINING WALLS 531 Wall 5m P a1h Pa 1 Pa1v 2.67 m Pw Pah 49 Fig. 13.67 Horizontal ...

DHARM 532 GEOTECHNICAL ENGINEERING H= 4.5 m Wall AC 1 C 2 C C 3 C 4 C 5 C 6 (D) B y= 70° f= 32° K y-line 1 1 ¢ t 2 F 3 2 ¢ F¢ 3 ...

DHARM LATERAL EARTH PRESSURE AND STABILITY OF RETAINING WALLS 533 t′ t′: Tangent to the modified Culmann line, parallel to φ-lin ...

DHARM 534 GEOTECHNICAL ENGINEERING φ = 30° Ka = 130 130 −° 13 +° sin = sin / Horizontal pressure of soil at 3 m depth = Kaγ 1 H ...

DHARM LATERAL EARTH PRESSURE AND STABILITY OF RETAINING WALLS 535 Eccentricity, e = (1.317 + 0.565 – 1.750) = 0.132 m Since this ...

DHARM 536 GEOTECHNICAL ENGINEERING This acts at 1.33 m above the base, at an angle of 20° with the horizontal. Pah = Pai cos β = ...

DHARM LATERAL EARTH PRESSURE AND STABILITY OF RETAINING WALLS 537 The limiting values of lateral pressure occur when the wall y ...

DHARM 538 GEOTECHNICAL ENGINEERING References I. Alpan: The Empirical Evaluation of the Coefficient Ko and Kor, Soils and Found ...

DHARM LATERAL EARTH PRESSURE AND STABILITY OF RETAINING WALLS 539 Questions and Problems 13.1 Write notes on: (a) Rankine earth ...